<template>
<!-- swiperOption 需要绑定数据   -->
  <div class="wrapper">
    <swiper :options="swiperOption" v-if="showSwiper">
      <!-- slides -->
      <swiper-slide v-for="item of list" :key="item.id">
        <img class="swiper-img" :src="item.imgUrl"/>
      </swiper-slide>
      <!-- Optional controls -->
      <div class="swiper-pagination"  slot="pagination"></div>
    </swiper>
  </div>
</template>

<script>
export default {
  name: 'HomeSwiper',
  props: {
    list: Array
  },
  data () {
    return {
      swiperOption: {
        // 支持小圆点
        pagination: '.swiper-pagination',
        // 支持循环
        loop: true
      }
    }
  },
  computed: {
    showSwiper () {
      return this.list.length
    }
  }
}
</script>

<style lang="stylus" scoped>
  //穿透 让所有组件都能受此CSS影响
  .wrapper >>> .swiper-pagination-bullet-active
    background: #fff !important
  .wrapper
    overflow: hidden
    width: 100%
    height: 0
    padding-bottom: 30%
    // 这样覆盖点颜色不起作用，swiper库实现的CSS效果，由于scoped原因作用不到。
    // .swiper-pagination-bullet-active
      // background: red !important
    .swiper-img
      width: 100%

</style>
